将数据集SASHELP.workers第10到15条观测中满足条件"ELECTRIC>260"的观测提取出来,生成新的数据集tmp。 代码1: data tmp; set SASHELP.workers(firstobs=10 obs=15); if ELECTRIC > 260; run; proc print data = tmp; title 'IF Statement'; run;
在SAS中,可以使用IF语句来设置等于0或1的变量。IF语句是一种条件语句,根据条件的真假来执行不同的操作。 在SAS中,IF语句的基本语法如下: ``` IF condition THEN do;...
(subsetting IF statement) 语法:IF expression; 例: IF Sex = ' f ' ; IF expression; 这样的看起来有点怪,但是正确的. 表明: 当expression 是TRUE时, SAS继续执行 DATA step。 如果expression 是 FALSE, 对当前observation不继续执行下面的语句,且,该observation不加入到新生成的dataset中。 SAS...
Mike K Smith
sas条件判断语句where,if的区别,以及where选项 1:where和If最本质的区别,以及一些小的区别 1.1:The WHERE statement examines what is in the input page buffer and selects observations before they are loaded in the program data vector, which results in a savings in CPU operations(Where从buffer中进行...
sas条 件判断语句 where,if的 区别,以及 where选 项 1:where和If最本质的区别,以及一些小的区别 1.1:The WHERE statement examines what is in the input page buffer and selects observations before they are loaded in the program data vector, which results in a savings in CPU operations(Where从...
**ADDENDUM to original post: I realized that this issue was being caused by starting with a "RETAIN" statement, which I use to put the variables in the desired order. But I'd still like to leave this question up because I'd appreciate any feedback on: How does a RETAIN statement work...
setSASHELP.workers(firstobs=10obs=15); whereELECTRIC>260; run; procprintdata= tmp; title'WHEREStatement'; run; 运行结果(6条记录): 上述两种方法为什么输出结果不一样?请注意IF语句和WHERE语句的区别: (1)IF语句是面向“程序数据向量”(ProgramDataVector)的,对当前PDV中的数据进行判断,满足条件时将其写入...
select 里包含 if statement if语句和where语句是SAS中最常用的逻辑判断语句,主要用于数据筛选和条件赋值。当进行多分支的条件判断时,可以使用if...else语句来实现。如下: if .<AGE<18 then AGEGR1N=1; else if 18<=AGE<=40 then AGEGR1N=2; else if 41<=AGE<=64 then AGEGR1N=3;...
问如何从if语句创建永久更改？EN在VS编译器里，假如不想使用初始化的字体，以及背景颜色的话，该如何...